Tummy trouble

So my baby girl is 3 weeks old, and I could not ask for a better sweeter baby! She does not cry or fuss when she’s awake unless she’s hungry, eats about 4oz of breast milk through a bottle every 3/4 hours, and we do our best to always get at least 1 burp out of her if we can! She has about 2-3 dirty diapers a day;

She’s been sleeping well but I notice in her sleep she makes grunts of discomfort and almost sounds like she’s trying to push, I’ll hold her stomach gently sometimes while she sleeping (waiting on a tummy wrap to get delivered!) and she has has bubbles sometimes in there and does feel like she’s pushing! We are using gas drops, I just started probiotic drops, she also gets vitamin d drops cause of jaundice issues! But I’m nervous to give her to much over the course of the day!

What’s everyone’s routine with these things, or any other suggestions that could help, or is this just normal and okay for baby to sleep like this?